triclinic
Labradorite
(Ca,Na)(Al,Si)4O8
Quick Facts
Hardness
6.0
Specific Gravity
2.69
Refractive Index
1.559
Crystal Structure
triclinic[-1]:{010}@1.0 + {001}@0.8 + {110}@0.6 triclinic
-1
{010} {001} {110}
Physical Properties
Crystal Systemtriclinic
Hardness (Mohs)6.0
Specific Gravity2.69
CleavagePerfect in two directions at ~90 degrees
FractureUneven to conchoidal
LustreVitreous to pearly
Optical Properties
Refractive Index1.559
Birefringence0.008-0.010
PleochroismNone to weak
Dispersion0.012
Interactive Preview
Open this crystal in the CDL Playground to rotate, export, and explore in 3D.
Open in Playground triclinic[-1]:{010}@1.0 + {001}@0.8 + {110}@0.6 Related Minerals
Other minerals in the triclinic system
